MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

araqnid

create temp table t1(t1_id serial primary key, reference varchar(16) not null unique, value varchar(16) not null);
copy t1(reference, value) from stdin;
FOO	foo
BAR	bar
QUUX	quux
\.

create temp view t1_combined as
    select t1_id, reference, value, ctid, lp_flags, lp_off, case when t_ctid <> ctid then t_ctid end as t_ctid,
           t_xmin, xmin_visible, case when t_xmax::text <> '0' then t_xmax end as t_xmax, xmax_visible,